麻豆淫院

Lead author Dr. Felix Vaux, of the Department of Zoology, says earthquakes are typically considered devastating events for people and the environment, but the positive opportunities that they can create for wildlife are often overlooked.

For the Marsden-funded study, published in Journal of Phycology, the researchers sequenced DNA from 288 rimurapa (bull-kelp) plants from 28 places across central New Zealand.

"All specimens from the North Island were expected to be the species Durvillaea antarctica, but unexpectedly 10 samples from four sites were Durvillaea poha鈥攁bout 150 km from the nearest population on the Kaik艒ura Peninsula," Dr. Vaux says.

The range expansion of the seaweed seems to be associated with the, often forgotten, 1855 Wairarapa earthquake鈥擭ew Zealand's strongest recorded earthquake since European colonization, at magnitude 8.2.

"Uplift and landslides around Wellington cleared swathes of coastline of Durvillaea antarctica, and this seems to have allowed a previously South Island restricted species鈥擠urvillaea poha鈥攖o colonize and establish itself in the North Island.

"This exciting discovery highlights that frequent tectonic activity may be reshaping New Zealand's biodiversity, including its marine environments, and it reminds us that recent events鈥攕uch as the 2016 Kaik艒ura earthquake, may have long-lasting effects on the environment."

Dr. Vaux believes an increase in the species diversity of bull-kelp in the North Island is likely to be positive for the intertidal community as Durvillaea provides a sheltered habitat for numerous animals鈥攊ncluding crustaceans, molluscs such as p膩ua, spiders and fish.

"Our discovery is exciting because it indicates that tectonic disturbance can not only change population structure within a species, but it can also create ecological opportunity and shift the distribution of organisms.

"While many range shifts have been linked to climate change, tectonic disturbance should not be overlooked as a potential facilitator of range expansion. In our fast-changing world, it is becoming increasingly important to understand the forces that shape the distribution of species," he says.